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Publier une image simplement
13 avril 2011, par ,
Mis à jour : Février 2012
Langue : français
Type : Video
Sur d’autres sites (346)
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ffmpeg with libopenh264 to get profile high422
24 juillet 2023, par Андрей ТернитиI have raw MJPEG video file. 3840x2160, 25fps, YUYV 4:2:2. I want use ffmpeg with encoder libopenh264. Why I can't use profile high422 ?


ffmpeg -framerate 25 -i inFile.yuvj422p -profile:v high422 -c:v libopenh264 -q 2 -b 2500000 -allow_skip_frames 1 -maxrate 3500000 outFile.mkv


Log


...
[libopenh264enc @ 0x56077580ed80] [Eval @ 0x7ffe78457230] Undefined constant or missing '(' in 'high422'


Let's know encoder's capability


# ffmpeg -h encoder=libopenh264
Encoder libopenh264 [OpenH264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10]:
 General capabilities: threads 
 Threading capabilities: other
 Supported pixel formats: yuv420p
libopenh264enc AVOptions:
 -slice_mode <int> E..V......P set slice mode, use slices/max_nal_size (from 0 to 4) (default fixed)
 fixed 1 E..V....... a fixed number of slices
 dyn 3 E..V....... Size limited (compatibility name)
 sizelimited 3 E..V....... Size limited
 -loopfilter <int> E..V....... enable loop filter (from 0 to 1) (default 1)
 -profile <int> E..V....... set profile restrictions (from -99 to 65535) (default -99)
 constrained_baseline 578 E..V.......
 main 77 E..V.......
 high 100 E..V.......
 -max_nal_size <int> E..V....... set maximum NAL size in bytes (from 0 to INT_MAX) (default 0)
 -allow_skip_frames <boolean> E..V....... allow skipping frames to hit the target bitrate (default false)
 -cabac <int> E..V......P Enable cabac(deprecated, use coder) (from 0 to 1) (default 0)
 -coder <int> E..V....... Coder type (from -1 to 1) (default default)
 default -1 E..V.......
 cavlc 0 E..V.......
 cabac 1 E..V.......
 vlc 0 E..V.......
 ac 1 E..V.......
 -rc_mode <int> E..V....... Select rate control mode (from -1 to 3) (default quality)
 off -1 E..V....... bit rate control off
 quality 0 E..V....... quality mode
 bitrate 1 E..V....... bitrate mode
 buffer 2 E..V....... using buffer status to adjust the video quality (no bitrate control)
 timestamp 3 E..V....... bit rate control based on timestamp
</int></int></int></boolean></int></int></int></int>

Looks like there is no high422 profile in libopenh264. But I can find
PRO_HIGH422 in several places of source code...


ffmpeg version


# ffmpeg -v
ffmpeg version N-111611-g5b11ee9429 Copyright (c) 2000-2023 the FFmpeg developers
 built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
 configuration: --prefix=/home/a/Downloads/myGitHub/FFmpeg_fixing/ffmpeg_openh264/ffmpeg_build/ --pkg-config-flags=--static --extra-cflags=-I/home/a/Downloads/myGitHub/FFmpeg_fixing/ffmpeg_openh264/ffmpeg_build/include --extra-ldflags=-L/home/a/Downloads/myGitHub/FFmpeg_fixing/ffmpeg_openh264/ffmpeg_build/lib --extra-libs='-lpthread -lm' --ld=g++ --bindir=/home/a/bin --enable-gpl --enable-libopenh264


Why I can't use profile high422 ?


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How to use ffmpeg on a stream input to extract frames
21 juillet 2023, par Deepak SharmaI have tried piping the stream to a ffmpeg process for extracting the frames. It does process the small files and able to extract the frames successfully but for most of the files it throws error. The reference of the code I have used from this link- https://mathewsachin.github.io/blog/2017/07/28/ffmpeg-pipe-csharp.html
When I am running the below code


`


public static void RunFfmpeg()
 {
 
 //-framerate 20 -f rawvideo -pix_fmt rgb32 -video_size 1920x1080
 var inputArgs = "-i -";
 var outputArgs = "-ss 00:00 -t 20 -vf fps=5 $filename%03d.bmp";

 var process = new Process
 {
 StartInfo =
 {
 FileName = "ffmpeg",
 Arguments = $"{inputArgs} {outputArgs}",
 UseShellExecute = false,
 //CreateNoWindow = true,
 RedirectStandardInput = true,
 RedirectStandardOutput = true,
 WorkingDirectory = @"d:\ffmpegout"
 }
 };

 process.Start();

 var ffmpegIn = process.StandardInput.BaseStream;

 using (Stream contents = File.OpenRead("C:\\Desktop\\Videos\\B.mp4"))
 {
 contents.CopyTo(ffmpegIn);
 }

 // After you are done
 ffmpegIn.Flush();
 ffmpegIn.Close();

 // Make sure ffmpeg has finished the work
 process.WaitForExit();
 }`


I am getting the below error


ffmpeg version 2023-07-16-git-c541ecf0dc-full_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers
built with gcc 12.2.0 (Rev10, Built by MSYS2 project)
configuration : —enable-gpl —enable-version3 —enable-static —disable-w32threads —disable-autodetect —enable-fontconfig —enable-iconv —enable-gnutls —enable-libxml2 —enable-gmp —enable-bzlib —enable-lzma —enable-libsnappy —enable-zlib —enable-librist —enable-libsrt —enable-libssh —enable-libzmq —enable-avisynth —enable-libbluray —enable-libcaca —enable-sdl2 —enable-libaribb24 —enable-libaribcaption —enable-libdav1d —enable-libdavs2 —enable-libuavs3d —enable-libzvbi —enable-librav1e —enable-libsvtav1 —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxavs2 —enable-libxvid —enable-libaom —enable-libjxl —enable-libopenjpeg —enable-libvpx —enable-mediafoundation —enable-libass —enable-frei0r —enable-libfreetype —enable-libfribidi —enable-libharfbuzz —enable-liblensfun —enable-libvidstab —enable-libvmaf —enable-libzimg —enable-amf —enable-cuda-llvm —enable-cuvid —enable-ffnvcodec —enable-nvdec —enable-nvenc —enable-d3d11va —enable-dxva2 —enable-libvpl —enable-libshaderc —enable-vulkan —enable-libplacebo —enable-opencl —enable-libcdio —enable-libgme —enable-libmodplug —enable-libopenmpt —enable-libopencore-amrwb —enable-libmp3lame —enable-libshine —enable-libtheora —enable-libtwolame —enable-libvo-amrwbenc —enable-libcodec2 —enable-libilbc —enable-libgsm —enable-libopencore-amrnb —enable-libopus —enable-libspeex —enable-libvorbis —enable-ladspa —enable-libbs2b —enable-libflite —enable-libmysofa —enable-librubberband —enable-libsoxr —enable-chromaprint
libavutil 58. 14.100 / 58. 14.100
libavcodec 60. 22.100 / 60. 22.100
libavformat 60. 10.100 / 60. 10.100
libavdevice 60. 2.101 / 60. 2.101
libavfilter 9. 8.102 / 9. 8.102
libswscale 7. 3.100 / 7. 3.100
libswresample 4. 11.100 / 4. 11.100
libpostproc 57. 2.100 / 57. 2.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000266a80179c0] Could not find codec parameters for stream 0 (Video : h264 (avc1 / 0x31637661), none(tv, bt709), 1280x720, 4023 kb/s) : unspecified pixel format
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'fd :' :
Metadata :
major_brand : isom
minor_version : 512
compatible_brands : isomiso2avc1mp41
encoder : Lavf58.76.100
Duration : 00:00:21.22, start : 0.000000, bitrate : N/A
Stream #0:00x1 : Video : h264 (avc1 / 0x31637661), none(tv, bt709), 1280x720, 4023 kb/s, SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 30k tbn (default)
Metadata :
handler_name : VideoHandler
vendor_id : [0][0][0][0]
Stream mapping :
Stream #0:0 -> #0:0 (h264 (native) -> bmp (native))
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000266a80179c0] stream 0, offset 0xbb3a : partial file
Cannot determine format of input stream 0:0 after EOF
Error marking filters as finished
Conversion failed !


I did check the metadata of the video is present in the start of the file before the mdat box.


Looking to get some help to resolve this issue.


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Flutter ffmpeg kit : Invalid size error when trying to scale video
27 juillet 2023, par veryepicdudeI'm trying to resize a video to match instagram's video format requirements. I'm using the
ffmpeg_kit_flutter_full_gpl: ^5.1.0package to do so and this is the function I'm calling :

Future<void> resizeVideo(String input, String output) async {

 final command = '-i $input -c:v libx264 -aspect 16:9 -crf 18 -vf "scale=iw*min(1280/iw\,720/ih):ih*min(1280/iw\,720/ih),pad=1280:720:(1280-iw)/2:(720-ih)/2" -fpsmax 60 -preset ultrafast -c:a aac -b:a 128k -ac 1 -use_editlist false -ar 48000 -pix_fmt yuv420p -movflags +faststart -t 59 -y $output';
 final session = await FFmpegKit.execute(command);
 print("resize done with ${await session.getReturnCode()}");
}
</void>

However I get this error every time :


Stream #0:0[0x1](und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 60 kb/s (default)
 Metadata:
 creation_time : 2023-07-27T15:30:28.000000Z
 handler_name : Core Media Audio
 vendor_id : [0][0][0][0]
 Stream #0:1[0x2](und): Video: hevc (hvc1 / 0x31637668), yuv420p(tv, smpte170m/bt709/bt709), 720x1280, 2085 kb/s, 30 fps, 30 tbr, 600 tbn (default)
 Metadata:
 creation_time : 2023-07-27T15:30:28.000000Z
 handler_name : Core Media Video
 vendor_id : [0][0][0][0]
Stream mapping:
 Stream #0:1 -> #0:0 (hevc (native) -> h264 (libx264))
 Stream #0:0 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[Parsed_scale_0 @ 0x2834a53f0] Invalid size 'iw*min(1280/iw'
[AVFilterGraph @ 0x28278e3a0] Error initializing filter 'scale'[AVFilterGraph @ 0x28278e3a0] with args 'iw*min(1280/iw'[AVFilterGraph @ 0x28278e3a0] 
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #0:1
[aac @ 0x105334290] Qavg: 461.613
[aac @ 0x105334290] 2 frames left in the queue on closing


Removing the scale filter makes the function work fine, but it fails the instagram video requirements listed here.
Any help will be greatly appreciated.


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